Watermarking mechanism.



H. J. GUILD. WATERMARKING MECHANISM.

APPLICATION FILED FEB-9,19]?- Patented JulyS, 1917'.

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HENRY J. GUILD, 0F BANGOR, MAINE, ASSIGNOR TO EASTERN MANUFACTURING- COM- FAN, OF BANGOR, MAINE, A CORPORATION OF MAINE.

'WATERMARKING MECHANISM.

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Specification of Letters Patent.

Patented July 3, 191?.

Application filed Februaiy 9, 1917. Serial No. 147,609.

To all whom it may concern:

Be it known that I, HENRY J. GUILD, a citizen of the United States, residing at Bangor, in the county of Penobscot and State of Maine, have invented new and useful Improvements in Watermarking Mechanism, of which the following is a specification.

This invention relates to machines for forming water-marks in paper in the process of manufacture thereof.

It has long been regarded as desirable to form the dandy roll in sections so that each section may be provided with its special mark, and various forms of sectional rolls have been suggested for this purpose. But one of the chief difliculties which have prevented the practical use of such rolls is that in forming the roll in sections there is always one or more crevices between the sections which cause an undesirable mark in the Consequently, notwithstanding the advantages to be gained by a sectional formation of the roll to permit each section to carry its own mark, for practical considerations such sectional rolls have not been practically successful. This can be readily understood when it is remembered that the paper should be uniform in appearance, save for the water-mark, and should receive sub stantially the same pressure and be accorded the same treatm nt throughout its area, when in the Wet ulpy condition requisite to the formation of a water-mark therein.

The present invention has for its object to remedy the faults found in the sectional dandy. rolls which have-heretofore been suggested, and to provide a sectional roll which may be practically employed without disfiguring the paper. How this is accomplished and in what the invention consists will be made plain from the'drawings and the following specification and claims.

Referring to the said drawings,

Figure 1 illustrates a portion of a Fourdrinier' machine equipped with a watermarking mechanism embodying the invention.

Fig. 2 illustrates the sectional dandy roll, the several sections of the sleeve of which may carry the marks.

Fig. 3 illustrates the follower roll.

Fig. 4 ilustrates in longitudinal section one of the dandy roll removable sleeve sections.

I have illustrated on the drawing a part i of a paper-making machine, comprising the Fourdrinier frame 10, the wire 11, and the suction boxes 120, all of which are ,of the usual construction. At 12 and 13, I have illustrated two complemental dandy rolls, the former of which carries the water-marks. The shafts of these rolls maybe journaled in any suitable way, as in brackets 14: slidable on upright posts 15 on the frame of the machine and adjusted thereon by screws 16 and nuts 17. The nuts bear on lugs 18 resting' on shouldered portions of the posts 15. The dandy roll 12 has a peripheral sleeve which is divided into as many'interchangeable and removable sections as may be desired. These sections are indicated at 19, 19, and they are made of wire gauze of the desired mesh, say 60 to 65. Each sleeve has a cylindrical portion a with tapering curved end portions a, so that only the cylindrical portion of each sleeve will bear upon the web of paper. Each sleeve may have the water-mark fixed thereto in the usual way as indicated at 20. The complemental or follower roll 13 likewise has a wire periphery and it has cylindrical portions b which are equal in length to the two tapering end portions of two adjacent section's 19, so that that portion of the web of paper which is not engaged by the cylindrical portion of the sleeve 19 on the roll 12 may be engaged by the cylindrical portion 6 of the follower roll. The longitudinal spaces in the follower roll 13 between the cylindrical spaces are peripherally depresed so as to not engage the work. In both rolls, the depressed or inwardly tapering portions merge so gradually into the cylindrical portions that there will be no mark of any kind left upon the paper, and yet the entire surface of the paper will be subjected to the same pressure and treatment except those portions which are engaged by the water-marks 20.

If desired, the peripheral portion of the roll 13 may be made in sections, but I have illustrated it for con'venience'as being made of one continuous sleeve, since there is no particular point in forming it in sections exdistant from each other and from their common center. Each sleeve therefore consists of the slats or central supporting members,

, the spacers and the wire gauze peripheral member. The peripheral portion or sleeve of the roll 13 may be constructed in like manner with inner slats and with spacers upon which the wire gauze peripheral member is laid .and secured. The sleeves of both rolls are mounted upon any suitable supporting medium. Preferably, although not necessarily, I employ for this purpose a skeleton which consists of a longitudinal shaft 26 having spoked wheels 27 secured thereon, to the rims of which are secured the longitudinal bars or slats 28. The spaces between these bars or slats 28 are just wide enough to receive the slats 25 of the sleeves of the roll so that the said sleeves may be slid endwise thereon. Preferably the fit is tight enough so that the sleeves will be held frictionally in place against accidental longitudinal displacement. Any suitable material may be employed for making the skeleton frames and in manufacturing the spec ers 22, 23 and 24, and the slats 25, but preferably metal is employed. The engagement of the complemental slats 25 and 28 causes the sleeves and the skeleton frames to rotate in unison as the paper web presses beneath the roll.

It is quite evident that the details of construction which I have herein described may be greatly varied without departing from the spirit and scope of the invention as expressed in the claims.

From the foregoing description it will be apparent that the two dandy rolls are complemental, 0., each roll has a wire gauze shell with cylindrical portions and intervening depressed portions, the cylindrical portion of the shell of one roll registering with the depresse portion of the shell of the other roll; and it will be further apparent that, if desired, permanent water-marks maybe atlixed upon the cylindrical portions of the roll 13, particularly if it be thought desirable to water1nark each divisible sheet with a generic mark, and to mark each sheet with different marks specific to the various subdivisions thereof.

The longitudinally sepa'able sections of the wire shell of roll 12 with their convexly tapering end portions terminate in the depressed portions of the entire shell, considered as a whole, but it is not necessary that the sleeve sections should abut, since spaces could be left be tween them if desired. The longitudinal spaced bars 25 and 28 with which the sleeve (and the sections thereof) and the central rotary support or skeleton form are provided, constitute interlocking or intersliding guide members for connecting the sleeve and support. These spaced bars may be supplanted by any mechanically equivalent devices to secure the same result or to perform the same functions, as will be appreciated by those skilled in the art.

Having thus explained the nature of my said invention and described a way of making and using the same, although without attempting to set forth all of the forms in which it may be made or all of the modes of its use, what I claim is:

l. Mechanism for water-marking paper, comprising two complemental dandy rolls each provided wlth spaced cyhndrral peripheral portions with intervening depressed peripheral portions, the cylindrical portions of one roll registering with the depressed peripheral portions of the other roll, and water-marks on the cylindrical portions of one of said rolls.

2. Mechanism for water-marking paper, comprising two complemental dandy rolls each provided with spaced cylindrical peripheral portions with intervening depressed peripheral portions, the cylindrical portions of one roll registering with the depressed peripheral portions of the other roll, one of said rolls being formed with longitudinally separable sections which terminate in said depressed portions thereof, and water-marks on the cylindrical portions of said sections.

3. A dandyroll comprising a rotatable support, and a sleeve thereon having its peripheral shell formed of wire gauze with alternating cylindrical and depressed portions, and spacers supporting said peripheral portion.

4. A dandy roll comprising a rotatable support, a sleeve thereon consisting of a plurality of longitudinally separable sections, each section having a cylindrical intermediate portion and tapered end portions.

5. A dandy roll comprising a rotatable support, a sleeve thereon consisting of a plurality of longitudinally separable sec tions, each section consisting of a gauze shell and annular spacers therefor, said shells each having cylindrical intermediate portions and tapering end portions.

6. A sleeve for a water-marking dandy roll, consisting of a wire gauze shell. circu lar in cross section and havinga cylindrical ion intermediate. portion and tapered end portions, annular spacers supporting said shell at different points throughout its length, and means connecting said spacers.

7. A sleeve .for a Water-marking dandy roll, consisting of a Wire gauze shell, circular in cross section and having a cylindrical intermediate portion, convexly tapering end.

portions, and means for supporting said shell.

8. A sleeve for a Water-marking dandy roll, consisting of a wire gauze shell, annular spacers for said shell, and internal longitudinal bars or slats connecting said spacers.

9. A sleeve for a water-marking dandy roll, comprising a wire gauze shell having alternating cylindrical portions and circumferentially depressed portions, a plurality of bars or slats longitudinal of the shell and arranged about a common axis, and annular spacers secured on said slats and varying in dlameter to support the cylindrical and depressed portions of said shell.

10. A sleeve for water-marking dandy rolls, consisting of interchangeable longitudinally separable similar sections, each section comprising a foraminous shell having a cylindrical intermediate portion and inwardly curving ends, a plurality of annular supporting spacers therefor, and means within the shell connecting said spacers.

11. A water-marking dandy roll, comprising a sectional sleeve of which each section is formed with a foraminous shell having a cylindrical intermediate portion and tapering ends, a rotary support adapted to be journaled in bearings, and interlocking guide bars in said sleeve'sections and on said rotary support.

In testimony whereof I have aflixed my signature.

HENRY J. GUILD. 

